/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:26:41,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:26:41,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:26:41,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:26:41,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:26:41,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:26:41,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:26:41,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:26:41,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:26:41,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:26:41,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:26:41,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:26:41,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:26:41,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:26:41,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:26:41,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:26:41,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:26:41,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:26:41,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:26:41,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:26:41,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:26:41,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:26:41,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:26:41,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:26:41,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:26:41,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:26:41,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:26:41,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:26:41,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:26:41,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 17:26:41,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:26:41,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:26:41,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:26:41,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:26:41,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:26:41,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:26:41,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:26:41,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:26:41,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:26:41,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:26:41,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:26:41,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:26:41,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:26:41,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:26:41,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:26:41,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:26:41,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:26:41,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:26:41,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:26:41,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:26:41,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:26:41,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:26:41,223 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:26:41,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:26:41,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:26:41,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:26:41,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:26:41,224 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:26:41,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:26:41,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:26:41,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:26:41,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:26:41,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:26:41,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:26:41,227 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:26:41,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:26:41,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:26:41,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:26:41,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:26:41,562 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:26:41,562 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-07-17 17:26:41,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e696136/b2a55c6661ab42e48dd64f4eb929c02f/FLAG84ec36698 [2020-07-17 17:26:42,042 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:26:42,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-07-17 17:26:42,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e696136/b2a55c6661ab42e48dd64f4eb929c02f/FLAG84ec36698 [2020-07-17 17:26:42,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e696136/b2a55c6661ab42e48dd64f4eb929c02f [2020-07-17 17:26:42,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:26:42,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:26:42,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:26:42,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:26:42,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:26:42,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:42,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c893ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42, skipping insertion in model container [2020-07-17 17:26:42,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:42,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:26:42,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:26:42,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:26:42,766 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:26:42,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:26:42,813 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:26:42,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42 WrapperNode [2020-07-17 17:26:42,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:26:42,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:26:42,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:26:42,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:26:42,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:42,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:42,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:42,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:42,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:42,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:43,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... [2020-07-17 17:26:43,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:26:43,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:26:43,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:26:43,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:26:43,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:26:43,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:26:43,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:26:43,088 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-07-17 17:26:43,088 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-17 17:26:43,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:26:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:26:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 17:26:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 17:26:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:26:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:26:43,508 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:26:43,508 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:26:43,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:26:43 BoogieIcfgContainer [2020-07-17 17:26:43,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:26:43,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:26:43,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:26:43,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:26:43,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:26:42" (1/3) ... [2020-07-17 17:26:43,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd06def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:26:43, skipping insertion in model container [2020-07-17 17:26:43,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:42" (2/3) ... [2020-07-17 17:26:43,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd06def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:26:43, skipping insertion in model container [2020-07-17 17:26:43,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:26:43" (3/3) ... [2020-07-17 17:26:43,522 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-07-17 17:26:43,531 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:26:43,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:26:43,552 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:26:43,570 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:26:43,570 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:26:43,571 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:26:43,571 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:26:43,573 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:26:43,573 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:26:43,573 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:26:43,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:26:43,590 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-07-17 17:26:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-17 17:26:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:26:43,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:26:43,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:26:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:26:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1600319067, now seen corresponding path program 1 times [2020-07-17 17:26:43,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:26:43,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558220983] [2020-07-17 17:26:43,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:26:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:26:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:26:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:26:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:26:44,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558220983] [2020-07-17 17:26:44,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:26:44,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 17:26:44,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046800918] [2020-07-17 17:26:44,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:26:44,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:26:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:26:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:26:44,113 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 11 states. [2020-07-17 17:26:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:26:44,732 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2020-07-17 17:26:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:26:44,734 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-17 17:26:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:26:44,745 INFO L225 Difference]: With dead ends: 105 [2020-07-17 17:26:44,745 INFO L226 Difference]: Without dead ends: 52 [2020-07-17 17:26:44,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:26:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-17 17:26:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-17 17:26:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-17 17:26:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 51 transitions. [2020-07-17 17:26:44,795 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 51 transitions. Word has length 39 [2020-07-17 17:26:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:26:44,795 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 51 transitions. [2020-07-17 17:26:44,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:26:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 51 transitions. [2020-07-17 17:26:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 17:26:44,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:26:44,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:26:44,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:26:44,798 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:26:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:26:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2059010026, now seen corresponding path program 1 times [2020-07-17 17:26:44,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:26:44,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406014671] [2020-07-17 17:26:44,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:26:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:26:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:26:45,087 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:26:45,087 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:26:45,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:26:45,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:26:45 BoogieIcfgContainer [2020-07-17 17:26:45,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:26:45,155 INFO L168 Benchmark]: Toolchain (without parser) took 2686.23 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 102.8 MB in the beginning and 160.0 MB in the end (delta: -57.2 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:45,156 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:26:45,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.41 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:45,158 INFO L168 Benchmark]: Boogie Preprocessor took 195.12 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.0 MB in the beginning and 182.0 MB in the end (delta: -90.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:45,159 INFO L168 Benchmark]: RCFGBuilder took 502.78 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 159.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:45,160 INFO L168 Benchmark]: TraceAbstraction took 1637.75 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 158.3 MB in the beginning and 160.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:45,165 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.41 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 195.12 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.0 MB in the beginning and 182.0 MB in the end (delta: -90.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 502.78 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 159.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1637.75 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 158.3 MB in the beginning and 160.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; VAL [a={3:0}, b={6:0}] [L22] int *p1, *p2; VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L24] p1 = &a VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L25] p2 = &b VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L27] b = 1 VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L28] a = 5 VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L30] EXPR \read(a) VAL [\read(a)=5, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L30] a-- VAL [\read(a)=5, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L32] EXPR \read(a) VAL [\read(a)=4, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L32] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={7:0}, p2={2:0}] [L12] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L13] CALL g(p1, p2) VAL [p1={7:0}, p2={2:0}] [L5] EXPR \read(**p2) VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L5] int *pq = *p2; VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L7] EXPR \read(**p2) VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L7] *p1 = *p2 VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L8] *pq = 0 VAL [p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L13] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L14] return 1; VAL [\old(a)=4, \result=1, a=4, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L32] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={3:0}, b={6:0}, f(a, &p1, &p2)=1, p1={7:0}, p2={2:0}] [L32] a = f(a, &p1, &p2) VAL [\read(a)=4, a={3:0}, b={6:0}, f(a, &p1, &p2)=1, p1={7:0}, p2={2:0}] [L34] EXPR \read(*p1) VAL [\read(*p1)=0, \read(*p1)={6:0}, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L34] COND TRUE *p1 == 0 VAL [\read(*p1)=0, \read(*p1)={6:0}, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L40] __VERIFIER_error() VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 51 SDslu, 263 SDs, 0 SdLazy, 287 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 3838 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...